Libbie Henrietta HymanDied 3 Aug 1969 at age 80 (born 6 Dec 1888). U.S. zoologist who wrote two laboratory manuals and a comprehensive six-volume reference work, The Invertebrates, (1940-67) covering most phyla of its subject. This work, important for its organization, description and classification of invertebrates, is a reference still used today. Hyman continued her laboratory studies throughout her life and published some 145 scientific papers. The sixth volume was her last, completed at the age of seventy-eight, when she was suffering from Parkinson's disease.